G, GN
Wirewound Resistors, Military, MIL-PRF-26 Qualified, Vishay Dale
Document Number: 30205 For technical questions contact ww2bresistors@vishay.com www.vishay.com
Revision: 22-Mar-06 129
* On some standard reel pack methods, the leads may be trimmed
to a shorter length than shown.
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core: Ceramic, Beryllium oxide or alumina, depending on
resistor model
Coating: Special high temperature silicone
Standard Terminals: 100 % Sn, or 60/40 Sn/Pb coated
Copperweld®
NOTE: Military (RW) parts are only available with 60/40
Sn/Pb finish
End Caps: Stainless steel
Part Marking: DALE, Model, Wattage*, Value, Tolerance,
Date Code
* Wattage marked on part will be "U" characteristic
** L1 (Max.) dimension is clean lead to clean lead.
GN NON-INDUCTIVE
Models of equivalent physical and electrical specifications
are available with non-inductive (Aryton-Perry) winding.
They are identified by inserting the letter N after G in the
model number (GN-5, for example). Two conditions apply:
1. For GN models, divide maximum resistance values by two
2. Body O.D. on GN-5C may exceed that of the G-5C by 0.010"
TERMINATION
When G resistors will be operated at full rated power,
resistance welding or high temperature solder are the
recommended termination methods. Termination should be
made within 1/2 inch from end of resistor body.
C
D
L1.50
[38.10]*
Min.
L1
DIMEN
I
N
- 65 - 50 0 50 150 250 350
AMBIENT TEMPERATURE IN °C
Derating
120
100
80
60
40
20
0
% NI REW
OP DETAR
CHAR. V
CHAR. U
25
GLOBAL
MODEL
DIMENSIONS in inches [millimeters]
LL1**
(Max.) CD
G-1-80
0.250 ± 0.031 0.281 0.085 ± 0.020 0.020 ± 0.002
G-1-380
[6.35 ± 0.787] [7.14] [2.16 ± 0.508] [0.508 ± 0.051]
G2
0.312 ± 0.016 0.328 0.078 + 0.016 - 0.031 0.020 ± 0.002
[7.92 ± 0.406] [8.33] [1.98 + 0.406 - 0.787] [0.508 ± 0.051]
G-3-80
0.406 ± 0.031 0.437 0.094 ± 0.031 0.020 ± 0.002
G-3-380
[10.31 ± 0.787] [11.10] [2.39 ± 0.787] [0.508 ± 0.051]
G-5
0.562 ± 0.062 0.622 0.188 ± 0.032 0.032 ± 0.002
[14.27 ± 1.57] [15.80] [4.78 ± 0.813] [0.813 ± 0.051]
G-5C
0.500 ± 0.062 0.593 0.218 ± 0.032 0.040 ± 0.002
[12.70 ± 1.57] [15.06] [5.54 ± 0.813] [1.02 ± 0.051]
G-10
0.875 ± 0.062 1.0 0.312 ± 0.032 0.040 ± 0.002
[22.23 ± 1.57] [25.4] [7.92 ± 0.813] [1.02 ± 0.051]
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
(CHARACTERISTIC U)
Thermal Shock Rated power applied until thermally stable, then a min. of 15 minutes at - 55 °C ± (0.2 % + 0.05 Ω) ΔR
Short Time Overload 5 x power (G-1-80 thru G-5C), 10 x power (G-10) for 5 sec. ± (0.2 % + 0.05 Ω) ΔR
Dielectric Withstanding Voltage 1000 Vrms, one minute ± (0.1 % + 0.05 Ω) ΔR
Low Temperature Storage - 65 °C for 24 hours ± (0.2 % + 0.05 Ω) ΔR
High Temperature Exposure 250 hours at + 250 °C (Characteristic U) ± (0.5 % + 0.05 Ω) ΔR
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (0.2 % + 0.05 Ω) ΔR
Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 milliseconds, 10 shocks ± (0.1 % + 0.05 Ω) ΔR
Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 hours each ± (0.1 % + 0.05 Ω) ΔR
Load Life 2000 hours at rated power, + 25 °C, 1.5 hours “ON”, 0.5 hours “OFF” ± (0.5 % + 0.05 Ω) ΔR
Terminal Strength 5 to 10 sec., 5 or 10 lb pull test (depending on size),
torsion test - 3 alternating directions, 360° each ± (0.1 % + 0.05 Ω) ΔR